Reese Witherspoon is attached to star in "The Proposal," which she will produce through her Type A Films for Revolution Studios. Type A president Jennifer Simpson also is producing. The romantic comedy centers on a couple and their up-and-down journey as they plan their wedding. It is based on a pitch by writer Nicole Eastman, who will begin writing immediately. Revolution's Todd Garner will serve as executive producer and will oversee with Denise Decker. "Reese and I have been looking to find something to work on together for a long time, and we are excited that we finally have that opportunity," Garner said in a statement. "This is a terrific project that fits perfectly into Reese's strengths." Witherspoon most recently starred in "Legally Blonde 2: Red, White & Blonde" and next appears in "Vanity Fair." She also is developing "Sports Widow," which David Mirkin is rewriting and will direct for Universal. Witherspoon and Eastman are repped by WMA and Management 360.